#!/usr/bin/env python
# -*- coding:utf-8 -*-
# @FileName  :sqrt_03.py
# @Time      :2020/6/22 9:38
# @Author    :Administrator

import math

a = float(input("请输入一个数:"))

a_sqrt = math.sqrt(a)
print('{0}的平方根是:{1}'.format(a, a_sqrt))
